Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits

Details Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits

2008-12-15

arxiv.org/abs/0812.2678v1

Phys. Rev. B 79, 180511(R) (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures, version with high resolution figures available at http://qudev.ethz.ch/content/science/PubsPapers.html

Scientific paper

10.1103/PhysRevB.79.180511

We demonstrate time resolved driving of two-photon blue sideband transitions between superconducting qubits and a transmission line resonator. Using the sidebands, we implement a pulse sequence that first entangles one qubit with the resonator, and subsequently distributes the entanglement between two qubits. We show generation of 75% fidelity Bell states by this method. The full density matrix of the two qubit system is extracted using joint measurement and quantum state tomography, and shows close agreement with numerical simulation. The scheme is potentially extendable to a scalable universal gate for quantum computation.

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